body{
font-family: "Microsoft YaHei UI";
padding: 0;
margin: 0;
}
.logoimg{
    text-align: center;
    padding: 150px 0 50px 0;
}
.logonr{
    text-align: center;
    font-size: 3rem;
    font-weight: bold;
    padding-bottom: 130px;
}
.down-bottm{
    background-image: url("../images/downbg.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
}
.down-bottm{
text-align: center;
}
.bottn-nr{
    text-align: center;
    font-size: 3rem;
    font-weight: bold;
    color: white;
    padding: 90px 0;
}
.downimg{
    width: 40%;
    margin: 60px auto;
    border: 1px solid white;
    padding: 10px 70px;
    border-radius: 20px;
}
.downimg>img{
width: 100%;
}